I'd hadn't realised that you'd taken to using the Royal "we".
Perhaps if you'll permit therefore your Highness, to submit the following explanation as a plea for clemency
It was always my belief that you could only misquote someone in writing, if you placed the quote in question, in quotation marks, and it subsequently proved to be incorrect. Luckily I suspect that "the mug readers of this forum" as you delicately refer to them, (note the quotation marks) know this. So no I have most certainly not misquoted him (David Cameron)
If I elect instead to take the gist of what he said, then that is called paraphrasing and is widely used in both the written and spoken language. Sometimes it's necessary to spell out to some people that you're paraphrasing, but you'll occasionally be accused of patronising them if you do. In this case I'd choose to encourage the reader to draw their own conclusions regarding whether "make any difference" (as in, things won't change) is a significant corruption of "not transform" - in the sense that transform usually means change